RTD Temperature Calculator (PT100/PT1000)
Calculate temperature from PT100 or PT1000 RTD (Resistance Temperature Detector) measured resistance using the linear Callendar-Van Dusen approximation.
Formula
How It Works
Resistance Temperature Detectors (RTDs) are precision temperature sensors that utilize the predictable relationship between electrical resistance and temperature in pure metals. The PT100 and PT1000 are standardized platinum resistance thermometers where the '100' or '1000' represents the resistance at 0°C, and the fundamental principle is that the electrical resistance of platinum increases linearly with temperature.
Worked Example
Problem: Calculate the temperature for a PT100 sensor with a measured resistance of 138.5Ω Solution: 1. R0 = 100Ω, α = 0.003851°C⁻¹ 2. T = (138.5 - 100) / (100 * 0.003851) 3. T = 38.5 / (100 * 0.003851) 4. T = 100°C
Practical Tips
- ✓Always verify the specific RTD type (PT100 or PT1000) before calculation
- ✓Use high-precision measurement equipment for accurate results
- ✓Consider calibration for critical temperature measurements
Common Mistakes
- ✗Forgetting to use the correct R0 value for the specific RTD type
- ✗Neglecting temperature compensation for long sensor leads
- ✗Using the formula outside the valid temperature range
Frequently Asked Questions
Related Calculators
Sensor
NTC Thermistor
Calculate temperature from NTC thermistor resistance using the Steinhart-Hart beta equation. Useful for PT100/PT1000 and generic NTC thermistors.
Sensor
Wheatstone Bridge
Calculate Wheatstone bridge output voltage, balance condition, and sensitivity. Used for strain gauges, RTDs, and precision resistance measurements.
Thermal
Junction Temperature
Calculate semiconductor junction temperature from power dissipation and thermal resistance chain (θJC + θCS + θSA). Essential for transistor, MOSFET, and IC thermal design.
Sensor
Hall Effect Sensor
Calculate Hall voltage, Hall coefficient, and sensitivity for Hall effect sensors. Useful for magnetic field measurement, current sensing, and position detection.
Sensor
Strain Gauge Bridge
Calculate Wheatstone bridge output voltage for strain gauges. Supports quarter, half, and full bridge configurations for structural monitoring and load cell design.